using System;
using System.Collections.Generic;
using System.Text;

namespace RStarTree
{
    public interface Sortable
    {
        // returns true if this<s according to the sortCriterion
         Boolean lessThan(Sortable s, int sortCriterion);

        // returns true if this>s according to the sortCriterion
         Boolean greaterThan(Sortable s, int sortCriterion);
    }
}
